Quarterly Percent
1999-04-01 39.7
1999-07-01 39.4
1999-10-01 40.2
2000-01-01 41
2000-04-01 41.4
2000-07-01 42
2000-10-01 42.3
2001-01-01 42.6
2001-04-01 43.1
2001-07-01 43
2001-10-01 43.4
2002-01-01 43.9
2002-04-01 44.6
2002-07-01 44.5
2002-10-01 45.1
2003-01-01 45.3
2003-04-01 46.3
2003-07-01 46.7
2003-10-01 46.8
2004-01-01 46.6
2004-04-01 47.2
2004-07-01 46.6
2004-10-01 47.3
2005-01-01 47.9
2005-04-01 48.2
2005-07-01 47.8
2005-10-01 48.1
2006-01-01 48.5
2006-04-01 48.9
2006-07-01 49.1
2006-10-01 49.4
2007-01-01 49.1
2007-04-01 48.8
2007-07-01 48.6
2007-10-01 48.9
2008-01-01 48.8
2008-04-01 49
2008-07-01 48.7
2008-10-01 49.5
2009-01-01 49.2
2009-04-01 49.3
2009-07-01 49.1
2009-10-01 49.1
2010-01-01 49.7
2010-04-01 49
2010-07-01 50
2010-10-01 49.2
2011-01-01 49.6
2011-04-01 49.4
2011-07-01 49.7
2011-10-01 49.3
2012-01-01 50.5
2012-04-01 50.9
2012-07-01 50.9
2012-10-01 51.8
2013-01-01 52.1
2013-04-01 53
2013-07-01 53.1
2013-10-01 53.9
2014-01-01 54.2
2014-04-01 54.3
2014-07-01 54.0
2014-10-01 55.2
2015-01-01 55.5
2015-04-01 55.3
2015-07-01 56.2
2015-10-01 56.8
2016-01-01 56.8
2016-04-01 58.0
2016-07-01 57.1
2016-10-01 57.7
2017-01-01 58.5
2017-04-01 58.7
2017-07-01 59.1
2017-10-01 60.0
2018-01-01 60.1
2018-04-01 60.4